Diffusional Effects in Simulated Localized Corrosion

摘要: The importance of diffusion was investigated under potentiostatic dissolution conditions with wire electrodes contained in inert supports. artificial cavities created simulated localized corrosion conditions. Current-time behavior at voltages excess the critical pitting potential (>0.5V (SCE)) examined for nickel and stainless steel specimens concentrated chloride solutions. effect changing concentration or activity gradient dissolving metal cations within cavity studied by alternating composition bulk solution. Solutions FeCl/sub 2/, NiCl/sub CrCl/sub 3/, LiCl, NaCl, MgCl/sub CeCl/sub 3/ ranging from 0.5 to 10M were used. Mass transfer models developed observed transient quasi steady-state periods dissolution. (auth)